[v2] event/cnxk: flush event queues over multiple pass

  If an event queue flush does not complete after a fixed number of tries,
remaining queues are flushed before retrying the one with incomplete
flush.

Signed-off-by: Shijith Thotton <sthotton@marvell.com>
---
 drivers/event/cnxk/cn10k_eventdev.c | 10 +++++++++-
 drivers/event/cnxk/cn9k_eventdev.c  | 10 +++++++++-
 drivers/event/cnxk/cnxk_eventdev.c  | 31 ++++++++++++++++++++++-------
 drivers/event/cnxk/cnxk_eventdev.h  |  5 +++--
 4 files changed, 45 insertions(+), 11 deletions(-)
  

On Mon, May 16, 2022 at 9:52 PM Shijith Thotton <sthotton@marvell.com> wrote:
>
> If an event queue flush does not complete after a fixed number of tries,
> remaining queues are flushed before retrying the one with incomplete
> flush.
>
> Signed-off-by: Shijith Thotton <sthotton@marvell.com>

Applied to dpdk-next-net-eventdev/for-main. Thanks


> ---
>  drivers/event/cnxk/cn10k_eventdev.c | 10 +++++++++-
>  drivers/event/cnxk/cn9k_eventdev.c  | 10 +++++++++-
>  drivers/event/cnxk/cnxk_eventdev.c  | 31 ++++++++++++++++++++++-------
>  drivers/event/cnxk/cnxk_eventdev.h  |  5 +++--
>  4 files changed, 45 insertions(+), 11 deletions(-)
>
> diff --git a/drivers/event/cnxk/cn10k_eventdev.c b/drivers/event/cnxk/cn10k_eventdev.c
> index 94829e789c..f70c4c58ce 100644
> --- a/drivers/event/cnxk/cn10k_eventdev.c
> +++ b/drivers/event/cnxk/cn10k_eventdev.c
> @@ -108,10 +108,11 @@ cn10k_sso_hws_release(void *arg, void *hws)
>         memset(ws, 0, sizeof(*ws));
>  }
>
> -static void
> +static int
>  cn10k_sso_hws_flush_events(void *hws, uint8_t queue_id, uintptr_t base,
>                            cnxk_handle_event_t fn, void *arg)
>  {
> +       uint64_t retry = CNXK_SSO_FLUSH_RETRY_MAX;
>         struct cn10k_sso_hws *ws = hws;
>         uint64_t cq_ds_cnt = 1;
>         uint64_t aq_cnt = 1;
> @@ -141,6 +142,8 @@ cn10k_sso_hws_flush_events(void *hws, uint8_t queue_id, uintptr_t base,
>                         fn(arg, ev);
>                 if (ev.sched_type != SSO_TT_EMPTY)
>                         cnxk_sso_hws_swtag_flush(ws->base);
> +               else if (retry-- == 0)
> +                       break;
>                 do {
>                         val = plt_read64(ws->base + SSOW_LF_GWS_PENDSTATE);
>                 } while (val & BIT_ULL(56));
> @@ -151,8 +154,13 @@ cn10k_sso_hws_flush_events(void *hws, uint8_t queue_id, uintptr_t base,
>                 cq_ds_cnt &= 0x3FFF3FFF0000;
>         }
>
> +       if (aq_cnt || cq_ds_cnt || ds_cnt)
> +               return -EAGAIN;
> +
>         plt_write64(0, ws->base + SSOW_LF_GWS_OP_GWC_INVAL);
>         rte_mb();
> +
> +       return 0;
>  }
>
>  static void
> diff --git a/drivers/event/cnxk/cn9k_eventdev.c b/drivers/event/cnxk/cn9k_eventdev.c
> index 987888d3db..dce975bba2 100644
> --- a/drivers/event/cnxk/cn9k_eventdev.c
> +++ b/drivers/event/cnxk/cn9k_eventdev.c
> @@ -117,11 +117,12 @@ cn9k_sso_hws_release(void *arg, void *hws)
>         }
>  }
>
> -static void
> +static int
>  cn9k_sso_hws_flush_events(void *hws, uint8_t queue_id, uintptr_t base,
>                           cnxk_handle_event_t fn, void *arg)
>  {
>         struct cnxk_sso_evdev *dev = cnxk_sso_pmd_priv(arg);
> +       uint64_t retry = CNXK_SSO_FLUSH_RETRY_MAX;
>         struct cnxk_timesync_info *tstamp;
>         struct cn9k_sso_hws_dual *dws;
>         struct cn9k_sso_hws *ws;
> @@ -164,6 +165,8 @@ cn9k_sso_hws_flush_events(void *hws, uint8_t queue_id, uintptr_t base,
>                         fn(arg, ev);
>                 if (ev.sched_type != SSO_TT_EMPTY)
>                         cnxk_sso_hws_swtag_flush(ws_base);
> +               else if (retry-- == 0)
> +                       break;
>                 do {
>                         val = plt_read64(ws_base + SSOW_LF_GWS_PENDSTATE);
>                 } while (val & BIT_ULL(56));
> @@ -174,7 +177,12 @@ cn9k_sso_hws_flush_events(void *hws, uint8_t queue_id, uintptr_t base,
>                 cq_ds_cnt &= 0x3FFF3FFF0000;
>         }
>
> +       if (aq_cnt || cq_ds_cnt || ds_cnt)
> +               return -EAGAIN;
> +
>         plt_write64(0, ws_base + SSOW_LF_GWS_OP_GWC_INVAL);
> +
> +       return 0;
>  }
>
>  static void
> diff --git a/drivers/event/cnxk/cnxk_eventdev.c b/drivers/event/cnxk/cnxk_eventdev.c
> index be021d86c9..91235ed9f3 100644
> --- a/drivers/event/cnxk/cnxk_eventdev.c
> +++ b/drivers/event/cnxk/cnxk_eventdev.c
> @@ -385,9 +385,10 @@ static void
>  cnxk_sso_cleanup(struct rte_eventdev *event_dev, cnxk_sso_hws_reset_t reset_fn,
>                  cnxk_sso_hws_flush_t flush_fn, uint8_t enable)
>  {
> +       uint8_t pend_list[RTE_EVENT_MAX_QUEUES_PER_DEV], pend_cnt, new_pcnt;
>         struct cnxk_sso_evdev *dev = cnxk_sso_pmd_priv(event_dev);
>         uintptr_t hwgrp_base;
> -       uint16_t i;
> +       uint8_t queue_id, i;
>         void *ws;
>
>         for (i = 0; i < dev->nb_event_ports; i++) {
> @@ -396,14 +397,30 @@ cnxk_sso_cleanup(struct rte_eventdev *event_dev, cnxk_sso_hws_reset_t reset_fn,
>         }
>
>         rte_mb();
> +
> +       /* Consume all the events through HWS0 */
>         ws = event_dev->data->ports[0];
>
> -       for (i = 0; i < dev->nb_event_queues; i++) {
> -               /* Consume all the events through HWS0 */
> -               hwgrp_base = roc_sso_hwgrp_base_get(&dev->sso, i);
> -               flush_fn(ws, i, hwgrp_base, cnxk_handle_event, event_dev);
> -               /* Enable/Disable SSO GGRP */
> -               plt_write64(enable, hwgrp_base + SSO_LF_GGRP_QCTL);
> +       /* Starting list of queues to flush */
> +       pend_cnt = dev->nb_event_queues;
> +       for (i = 0; i < dev->nb_event_queues; i++)
> +               pend_list[i] = i;
> +
> +       while (pend_cnt) {
> +               new_pcnt = 0;
> +               for (i = 0; i < pend_cnt; i++) {
> +                       queue_id = pend_list[i];
> +                       hwgrp_base =
> +                               roc_sso_hwgrp_base_get(&dev->sso, queue_id);
> +                       if (flush_fn(ws, queue_id, hwgrp_base,
> +                                    cnxk_handle_event, event_dev)) {
> +                               pend_list[new_pcnt++] = queue_id;
> +                               continue;
> +                       }
> +                       /* Enable/Disable SSO GGRP */
> +                       plt_write64(enable, hwgrp_base + SSO_LF_GGRP_QCTL);
> +               }
> +               pend_cnt = new_pcnt;
>         }
>  }
>
> diff --git a/drivers/event/cnxk/cnxk_eventdev.h b/drivers/event/cnxk/cnxk_eventdev.h
> index 5564746e6d..a490829a8a 100644
> --- a/drivers/event/cnxk/cnxk_eventdev.h
> +++ b/drivers/event/cnxk/cnxk_eventdev.h
> @@ -54,6 +54,7 @@
>  #define CN10K_GW_MODE_PREF     1
>  #define CN10K_GW_MODE_PREF_WFE 2
>
> +#define CNXK_SSO_FLUSH_RETRY_MAX 0xfff
>  #define CNXK_VALID_DEV_OR_ERR_RET(dev, drv_name)                               \
>         do {                                                                   \
>                 if (strncmp(dev->driver->name, drv_name, strlen(drv_name)))    \
> @@ -69,8 +70,8 @@ typedef int (*cnxk_sso_unlink_t)(void *dev, void *ws, uint16_t *map,
>                                  uint16_t nb_link);
>  typedef void (*cnxk_handle_event_t)(void *arg, struct rte_event ev);
>  typedef void (*cnxk_sso_hws_reset_t)(void *arg, void *ws);
> -typedef void (*cnxk_sso_hws_flush_t)(void *ws, uint8_t queue_id, uintptr_t base,
> -                                    cnxk_handle_event_t fn, void *arg);
> +typedef int (*cnxk_sso_hws_flush_t)(void *ws, uint8_t queue_id, uintptr_t base,
> +                                   cnxk_handle_event_t fn, void *arg);
>
>  struct cnxk_sso_qos {
>         uint16_t queue;
> --
> 2.25.1
>